Mycopathologia et mycologia applicata

, Volume 38, Issue 3, pp 257–269 | Cite as

Studies on the rhizosphere mycoflora of broad bean and cotton

II. Seed and root exudates and their effects on spore germination and growth of the prevalent fungi isolated from the rhizosphere
  • Y. A. Youssef
  • A. T. Mankarios


Seed and root exudates from three varieties of both broad bean and cotton grown aseptically were analyzed for amino acids and sugars. Broad bean varieties were found to excrete considerable amounts of amino compounds with 15 different amino acids, while cotton varieties excreted less consisting of 12 amino acids. Five sugars were identified in the seed and root exudates from broad bean varieties, while three were present in the seed and root exudates from cotton varieties. Seed and root exudates stimulated spore germination and growth of fungi isolated from the rhizosphere.


Sugar Root Exudate Spore Germination Broad Bean Amino Compound 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Cook, R. J. &Snyder, W. C. 1965. Influence of host exudates on growth and survival of germlings ofFusarium solani f.phaseoli in soil. Phytopathology,55 1021–1025.Google Scholar
  2. Forsman, B. 1955. Thesis, Institute of Physiological Botany, Univ. of Uppsala, Sweden.Google Scholar
  3. Fries, N. &Forsman, B. 1951. Quantitative determination of certain nucleic acid derivatives in pea root exudate. Physiol. Plant,4 410.Google Scholar
  4. Katznelson, H., Rouatt, J. W. &Payne, T. M. B. 1955. The liberation of amino acids and reducing compounds by plant roots. Plant Soil,7 35–48.Google Scholar
  5. Katznelson, H., Rouatt, J. W. &Payne, T. M. B. 1954. Liberation of amino acids by plant roots in relation to dessication. Nature,174 1110.PubMedGoogle Scholar
  6. Kandler, O. 1951. Papierchromatographischer Nachweis der Aminosäureausscheidung in vitro kultivierter Maiswurzeln. Z. Naturforsch.66 437.Google Scholar
  7. Lundegãrdh, H. &Stenlid, G. 1949. On the exudation of nucleotides and flavonones from living roots. Arkiv. Bot.31: A. N : O 10.Google Scholar
  8. Melin, E. 1954. Growth factor requirements of mycorrhizal fungi of forest trees. Svensk bot. Tidskr.48 86.Google Scholar
  9. Melin, E. &Rama Das, V. S. 1954. Influence of root metabolites on the growth of tree mycorrhizal fungi. Physiol. Plant.7 851.Google Scholar
  10. Schroth, M. N., Toussoun, T. A. &Snyder, W. C. 1963. Effect of certain constituents of bean exudate on germination of chlamydospores ofFusarium solania f.phaseoli in soil. Phytopathology,53 809–812.Google Scholar
  11. Schroth, M. N. &Cook, R. J. 1954. Seed exudation and its influence on pre-emergence damping-off of bean. Phytopathology,54 670–673.Google Scholar
  12. Turner, P. D. 1963. Influence of root exudates of Cacao and other plants on spore germination of Phytophthora palmivora. Phytopathology,53 1337–1339.Google Scholar
  13. Rovira, A. D. 1956. Plant root excretions in relation to the rhizosphere effects. I. The nature of root exudate from oats and peas. Plant Soil,7 178–194.Google Scholar
  14. Youssef, Y. A. &Mankarios, A. T. 1968. Studies on the rhizosphere mycoflora of broad bean and cotton I. The fungal flora of the rhizosphere. Mycopath. et Mycol. appl.35, 3–4: 389–400.Google Scholar

Copyright information

© Dr. W. Junk N.V. 1969

Authors and Affiliations

  • Y. A. Youssef
  • A. T. Mankarios

There are no affiliations available

Personalised recommendations